/* Executes irg_walk(end, pre, post, env) for all irgraphs in irprog.
Sets current_ir_graph properly for each walk. Conserves current
current_ir_graph. */
/* Executes irg_walk(end, pre, post, env) for all irgraphs in irprog.
Sets current_ir_graph properly for each walk. Conserves current
current_ir_graph. */